Why the $300 Million NGAD Sixth-Generation Fighter Jet Could Change EverythingThe U.S. Air Force’s evolving requirement for a next-generation aerial refueling ‘system of systems,’ including a possible stealth tanker, will have a direct impact on the service’s reassessment of plans for a new sixth-generation stealth ‘fighter.’ The Next Generation Aerial Refueling System (NGAS) effort will also inform work on the second phase of the Collaborative Combat Aircraft (CCA) drone.